FI90299C - Thermally insulated connection or manifold for heated hoses - Google Patents

Abstract

The invention relates to a connection or distribution piece for heatable hoses. The hose heating is carried out by means of heating conductors which are arranged running longitudinally in or on the hose wall. The connection piece consists of a connection element, inserted into the hose internal diameter, and insulation. According to the invention, the insulation is a sleeve tube (1), divided in the longitudinal axis, whose two half shells (11, 12) can be fixed on one another via connection means (111, 112, 121, 122), with the free ends (21) of the hoses (2) to be connected covered. On the outer surface of the connection element (3), there are integrally formed material steps (31, 32), increasing in thickness in the insertion direction, distributed on the circumference in the region of the insertion into the hose internal diameter (22). These material steps (31, 32) enter into a clamping effective connection with compression webs (113, 114, 123, 124) which are integrally formed on the inner circumference of the half shells (11, 12) when the hose (2) is retained on the connection element (3). <IMAGE>

Description

90299 Heat-insulated fitting or manifold for heated hoses Vårmeisolerat forbindnings- eller fordelningsstycke for upphettningsbara slangar 5

The invention relates to a thermally insulated connection or manifold for heated hoses, in which the heating of the hose takes place via electric heating conductors arranged in a longitudinally progressive manner in the wall of the hose or in a wall element formed by the middle of the hose.

A utility hose is known from the utility model DE-GM 86 22 603.7, in which an electric heating line is arranged in parallel with the central cavity in the wall wall of the hose. The central cavity is displaced from the shaft of the hose on one side so that the other side has a cross-sectional thickening in which the electric heating conductor is embedded. The hose wall area between the central cavity and the electric heating conductor is then 20 thinner in cross section than the hose wall area between the electric heating conductor and the surface adjacent to the hose.

A utility model DE-GM 87 04 903.1 discloses a thermally insulated connection or manifold for heated hoses, which consists of a connection element and insulation made of a thermally conductive material partially placed in the central cavity of the hose. The electric heating conductors of the hoses to be heated are obtained at the free ends by removing them from the wall of the hose and are placed around the parts of the connecting elements projecting from the central cavity of the hoses. The connector of the electric heating conductor 30 is led out of this area, and the free ends of the hose lines to be connected and the parts protruding from the hose lines of the connecting element and the connection element Although in this way a perfect connection of the heated hoses is achieved by heating the connecting element, the manufacture of such a connection is expensive and laborious, since the connection point of the hoses and the electrical connection must be placed in an injection molding machine and pressed with insulating material.

It is therefore an object of the present invention to provide an improved connection or manifold for heated hoses, which in a simple manner provides a connection point between the hose pieces of the dense and insulating layer. According to the improvement, the layer is a protective tube divided on the longitudinal axis, both half-shells of which can be placed via the connecting members to protect the free ends of the 1Q hoses to be superimposed, and a circumference is formed on the outer surface material1 i steps which come into contact with the pressure shoulders formed on the inner circumference of the hemispheres when the hose is installed in the connecting element 15.

In this case, it has proved advantageous that the interior space between the half-shells, the hose ends to be connected, the parts protruding from the central cavities of the hoses of the elements and the electric heating conductors 20 between the central cavities of the hoses can be filled in the interior.

It is simple to connect two hoses using a connection or manifold according to the invention. The connecting element is first placed 25 in the central cavities of the two hoses to be connected at their free ends.

These hose ends are made in such a way that the electric heating conductors are embedded in the free hose ends by removing them from the hose wall and connected to each other in an electrically conductive manner. Once this electrically conductive connection, which is usually soldering, has been made, this hose connection is placed over the half shell of the split 30 conduit. The upper half shell is then pulled onto the lower half shell, covering the entire connection or manifold. The insulating core can be fed through both half-shells into the remaining interior before or after being overlaid. The insulation may consist of a foamable material which foams the remaining interiors of the connection or manifold and thus forms a tight insulating jacket.

Il 3 90299 "I The connecting elements of the half-shells can be tensile or plug-in elements. even better in place so that it is impossible to remove these hose areas from the connecting elements placed in the central cavities of the hoses.

-JQ The drawing schematically shows examples of embodiments of a connecting or manifold according to the invention:

Figure 1 shows a connecting piece for a longitudinal connection of two hoses; 15

Figure 2 is a longitudinal section of a Y-shaped connection or manifold 1 e e s t a.

Figure 1 shows a longitudinal section of the connecting piece along the longitudinal connection of the two hoses 2. The figure shows only the lower half-shell 12 of a protective tube 1 consisting of two half-shells 11,12. In this half-shell are placed the free ends of hoses 2, which were previously connected to each other by a connecting element 3. This connection is made by inserting parts of the connecting element 3 påihin. The sub-areas placed in the central cavity of the connecting element 3 have circumferentially increasing layers of material 31,32 in the working direction, due to which the end of the hoses cannot be easily pulled out of the connecting element 3. The half-shell 12 is formed with pressure channels 30 123,124 in the free end region. with hoses when inserting the hose joint into the half shell. In this case, the flexible hose part, which is located above the inlet areas of the connecting element 3, is further depressed behind the material steps 31, 32. by the effect of pressure shoulder 123,124.

In this way, an almost inseparable locking of the hose end is provided in the inserted area of the connecting elements 3. The free ends 354 90299 1 of the half shells 11,12 are formed as ring clamps 125, 126 for additional securing arms. into the interior when placing the half shell 11 (not shown in the drawing) on the half shell 12. Prior to joining the two half-shells 11,12, a flowable insulating material can be placed in this interior, which completely fills the inner-1Q space between the half-shells and the composite hose connection after joining the half-shells. The outflow of insulating material is prevented by ring presses 125,126 in the free ends of the half-shells 11,12. The insulating material can be introduced into the interior formed as a result of the joining of the half-shells 11,12 inyos afterwards via a corresponding filling opening. In this case, a foaming insulating material may come into question, which also fills the filling opening tightly and insulatingly after feeding.

Prior to the joining of the half-shells 11,12, an electrical connection of the heating wires 23,24, which is usually soldering 231, must still be carried out.

20

It has already been mentioned that only the lower half shell 12 is shown in Figure 1.

The upper half shell 11 is a mirror image thereof, and can be connected to the connecting members 121,122 of the lower half shell 12 by means of connecting members 111,112. The connecting members 121 can then be plug-in openings in which the corresponding plug-in pins arranged on the upper half-shell 11 can be placed. Arranged on the lower half shell 12 are three such insertion openings 121 longitudinally divided, while three opposite insertion pins 122 are formed in the same division 3Q. Corresponding connecting members are arranged on opposite sides of the half shell 11 not shown.

The Y-shaped connecting or manifold shown in Fig. 2 is shown in the same shape as the manifold of Fig. 1. The lower half shell 35 12 has a base part 127 and upper parts 128,129 which differ from it in the Y-angle.

These sub-areas 127,128,129 have the same internal structure as the hatched sub-areas of Figure 1. The same sites have the same reference

II

5 90299 1 numbers. The hoses 2 in the upper parts 128,129 have a heating wire 23,24 which is in conductive connection with the wires 25,26 via solders 231,241.

g The joining of the half-shells 11,12 takes place in the same way as illustrated in Figure 1. The remaining gaps between the interconnected half-shells 11,12 are also filled in the same way.

10 15 20 25 30 35

Claims (4)

6 90299 A connecting or manifold for heated hoses, in which the heating of the hose takes place via electric heating conductors, g arranged in a longitudinally progressive manner in the wall of the hose or on a wall which is formed , both half shells (11, 12) being adjustable via connecting members (111, 112, 121, 122) to protect the free end (21) of the hoses (2) to be connected to each other, and that on the outer surface of the connecting element (3) the inner inlet region of the hose is formed, material steps (31,32) of increasing thickness in the direction of entry, which come into contact with the pressure shoulders (113,114,123,124) formed on the inner circumference of the half-shells (11,12) -jg when the hose is installed in the connecting element. 1 Claims Connecting or manifold according to Claim 1, characterized in that between the half-shells (11, 12), the hose ends (2) to be connected, the connecting element (3) projecting from the central cavity of the hose and the electric heating conductors (23, 24) led into the interior fill with insulating compound. A connecting or manifold according to claim 1, characterized in that et. The connecting members (111, 112, 121, 122) of the half-shells (11, 12) are tensile and / or plug elements. Connecting or manifold according to Claim 1, characterized in that the free ends of the half-shells (11, 12) are formed as annular presses (125, 126). 35 li 7 90299